This spell can't be countered. You may have Altered Ego enter the battlefield as a copy of any creature on the battlefield, except it enters with X additional +1/+1 counters on it.

You may have Body Double enter the battlefield as a copy of any creature card in a graveyard.

You may have Clever Impersonator enter the battlefield as a copy of any nonland permanent on the battlefield.

{1}{U}{B}: Exile target creature card from a graveyard. Dimir Doppelganger becomes a copy of that card, except it has this ability.

You may have Evil Twin enter the battlefield as a copy of any creature on the battlefield, except it has "{U}{B}, {T}: Destroy target creature with the same name as this creature."

You may have Mirror Image enter the battlefield as a copy of a creature you control.

Whenever a creature dies, you may pay {1}. If you do, Cemetery Puca becomes a copy of that creature, except it has this ability.

For each creature target player controls, create a token that's a copy of that creature.

Enchant creature At the beginning of your upkeep, create a token that's a copy of enchanted creature.

At the beginning of combat on your turn, create a token that's a copy of equipped creature, except the token isn't legendary. That token gains haste. Equip {5}

Enchant creature Whenever enchanted creature attacks, you may create a token that's a copy of that creature. Exile that token at end of combat.

You may have Progenitor Mimic enter the battlefield as a copy of any creature on the battlefield, except it has "At the beginning of your upkeep, if this creature isn't a token, create a token that's a copy of this creature."

Demonstrate (When you cast this spell, you may copy it. If you do, choose an opponent to also copy it. Players may choose new targets for their copies.) Create a token that's a copy of target permanent you control.

Kicker {5} (You may pay an additional {5} as you cast this spell.) Create a token that's a copy of target creature. If this spell was kicked, create five of those tokens instead.

You may have Spark Double enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1/+1 counter on it if it's a creature, it enters with an additional loyalty counter on it if it's a planeswalker, and it isn't legendary.

Look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard. Flashback {6}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Whenever a Frog you control attacks, mill three cards. Whenever a permanent card is put into your graveyard from your library, exile it with a croak counter on it. You may play lands and cast spells from among cards you own in exile with croak counters on them.

Each other player discards a card. You draw a card for each card discarded this way.

({T}: Add {G}.)

Golgari Guildgate enters the battlefield tapped. {T}: Add {B} or {G}.

({T}: Add {U}.)

Opulent Palace enters the battlefield tapped. {T}: Add {B}, {G}, or {U}.

({T}: Add {B}.)

Temple of Deceit enters the battlefield tapped. When Temple of Deceit enters the battlefield, scry 1. {T}: Add {U} or {B}.

Temple of Malady enters the battlefield tapped. When Temple of Malady enters the battlefield, scry 1. {T}: Add {B} or {G}.

Temple of Mystery enters the battlefield tapped. When Temple of Mystery enters the battlefield, scry 1. {T}: Add {G} or {U}.

When Eccentric Farmer enters the battlefield, mill three cards, then you may return a land card from your graveyard to your hand. (To mill a card, put the top card of your library into your graveyard.)

Reveal the top five cards of your library. You may put a creature or land card from among them into your hand. Put the rest into your graveyard.

When Moldgraf Millipede enters the battlefield, mill three cards, then put a +1/+1 counter on Moldgraf Millipede for each creature card in your graveyard. (To mill a card, put the top card of your library into your graveyard.)

Reveal the top four cards of your library. Put all land cards revealed this way into your hand and the rest into your graveyard.

When Old Rutstein enters the battlefield or at the beginning of your upkeep, mill a card. If a land card is milled this way, create a Treasure token. If a creature card is milled this way, create a 1/1 green Insect creature token. If a noncreature, nonland card is milled this way, create a Blood token.

When you cast this spell, reveal cards from the top of your library until you reveal X creature cards. Put all creature cards revealed this way into your graveyard, then put the rest on the bottom of your library in a random order. Old Stickfingers's power and toughness are each equal to the number of creature cards in your graveyard.

{T}: Mill two cards. {2}, Exile Perpetual Timepiece: Shuffle any number of target cards from your graveyard into your library.

When Satyr Wayfinder enters the battlefield, reveal the top four cards of your library. You may put a land card from among them into your hand. Put the rest into your graveyard.

Flash At the beginning of your upkeep, each player mills three cards. You may exile a creature card from among the cards milled this way. If you do, Shadow Kin becomes a copy of that card, except it has this ability.

Until end of turn, target creature gains deathtouch and "When this creature dies, return it to the battlefield tapped under its owner's control." You gain 2 life.

{T}: Add {U}. {2}{U}: Put an hour counter on Midnight Clock. At the beginning of each upkeep, put an hour counter on Midnight Clock. When the twelfth hour counter is put on Midnight Clock, shuffle your hand and graveyard into your library, then draw seven cards. Exile Midnight Clock.

{T}: Add {B} or {G}. {T}: Mill two cards.

When Desecrator Hag enters the battlefield, return to your hand the creature card in your graveyard with the greatest power. If two or more cards are tied for greatest power, you choose one of them.

Whenever a creature you don't control dies, return it to the battlefield under your control with an additional +1/+1 counter on it at the beginning of the next end step. That creature is a black Zombie in addition to its other colors and types.

Choose a creature type. Return up to two creature cards of that type from your graveyard to the battlefield. If this spell was foretold, return all creature cards of that type from your graveyard to the battlefield instead. Foretell {5}{B}{B} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

When Lazav, the Multifarious enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.) {X}: Lazav, the Multifarious becomes a copy of target creature card in your graveyard with mana value X, except its name is Lazav, the Multifarious, it's legendary in addition to its other types, and it has this ability.

Whenever another creature you control dies, you get an experience counter. At the beginning of your end step, choose target creature card in your graveyard. If that card's mana value is less than or equal to the number of experience counters you have, return it to the battlefield. Otherwise, put it into your hand.

Imprint — Whenever a nontoken creature dies, you may exile that card. If you do, return each other card exiled with Mimic Vat to its owner's graveyard. {3}, {T}: Create a token that's a copy of a card exiled with Mimic Vat. It gains haste. Exile it at the beginning of the next end step.

Flying When Puppeteer Clique enters the battlefield, put target creature card from an opponent's graveyard onto the battlefield under your control. It gains haste. At the beginning of your next end step, exile it. Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Whenever Rakshasa Debaser attacks, put target creature card from defending player's graveyard onto the battlefield under your control. Encore {6}{B}{B} ({6}{B}{B}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

You may play lands from your graveyard.

Return up to one target creature card and up to one target noncreature permanent card from your graveyard to your hand. Exile Retrieve.

Equipped creature gets +2/+2. Whenever a creature dealt damage by equipped creature this turn dies, return that card to the battlefield under your control. Attach Scythe of the Wretched to that creature. Equip {4}

Return target creature to its owner's hand. You may have Shapeshifters you control become copies of that creature until end of turn.

{4}{B}{B}: Exile target creature and put a +1/+1 counter on Dark Impostor. Dark Impostor has all activated abilities of all creature cards exiled with it.

Each player sacrifices a creature or planeswalker. If you sacrificed a permanent this way, you may return another permanent card from your graveyard to your hand.

Etrata, the Silencer can't be blocked. Whenever Etrata deals combat damage to a player, exile target creature that player controls and put a hit counter on that card. That player loses the game if they own three or more exiled cards with hit counters on them. Etrata's owner shuffles Etrata into their library.

If it's not your turn, you may exile a black card from your hand rather than pay this spell's mana cost. Destroy all creatures that entered the battlefield this turn.

Enchant creature As long as enchanted creature is black, it gets +1/+1 and has deathtouch. (Any amount of damage it deals to a creature is enough to destroy that creature.) As long as enchanted creature is green, it gets +1/+1 and all creatures able to block it do so.

Whenever Identity Thief attacks, you may exile another target nontoken creature. If you do, Identity Thief becomes a copy of that creature until end of turn. Return the exiled card to the battlefield under its owner's control at the beginning of the next end step.

Deathtouch All creatures able to block Ochran Assassin do so.

Each opponent sacrifices an artifact or enchantment.

Target opponent loses 4 life. You may search your library and/or graveyard for a card named Vraska, Scheming Gorgon, reveal it, and put it into your hand. If you search your library this way, shuffle.

Search your library for up to three creature cards, put them into your graveyard, then shuffle.

Search your library for an artifact card, reveal it, put it into your hand, then shuffle.